Valve construction



Jan. 8, 1946.

C. POOL VALVE CONSTRUCTION 4 Filed April' 23, 1945 Patented Jan. 8, 1946UNITED STATES PATENT OFFICE- y 2,392,5ur

vALva ooNsmaUo'rloN. cla-rence P001, Rivera; cam: Applicaumnprilzs,1943;.seria1-.No-.4s4-,294

ifoiamr. (cl. ati-14er" The valve with which'. the: present; invention..is concerned is. a. cut-oil" type andI is: primarily designed to stopthe: flow of uidlwhen a'pipe. or tubeis temporarily' opened for;`servicing, repair or` replacement; ValvesV of.: this type are-.slowlyand expensivelys. made;A because: ofi precisionm'achining-l of allparts: which. meet. or move. in;` close contact.

Especially ini times-of national emergency such as. the:A present; it.is of the greatestimportance expeditious methods be employed to increaseproduction without lmpairing;r quality,` andv of corse if possible toimprove upon present standar s.

In view of the foregoing it is a prime object of the present inventionto provide a simple, reliable, efficient, light weight, self-sealingplu-nger type of stop-valve.

A further and more specific object of the invention is to provide areplaceable moulded valve body sleeve within which a plunger may move toand from open position as a means of greatly reducing otherwisenecessary machining and hon- A still further object of the invention isto provide in a valve of the character contemplated and in combinationwith a sleeve of the type above set forth, a resilient seal interposedbetween the plunger and a metallic valve seat, the resilient seal beingheld in position by said sleeve.

Other objects, features and advantages of the invention will be apparentfrom the accompanying drawing, the following specification and thesubjoined claim.

In the drawing of which there is one sheet:

Figure 1 is a side-elevation of a valve of the type with which thisinvention is concerned.

Figure 2 is a longitudinal sectional elevation showing the constructionand relation of the replaceable sleeve with respectto a resilient valveseat and showing in side-elevation a plunger in cooperative relationshipto the above mentioned elements.

fire-walls; of air-craft. The valve body-being screwed; into thefire-walt. and' then: connected with' incoming andout-goingpipes-ortubes', how'- ever, itt is. not necessary that.y thevalve be, placed in` a: nre-wall for 'functional u'seg. ferr it' can'`be placedwithl equalfacility'l in` anyiiluidl line. f

The body- I2;Y of` the valveV isf provided. withl internal` 4threads |41which are? adapted tof receive. a threaded. plug I6 which forms theoutlet ofi the Valves I The-.inner walls |18 of the valve-body' I2` areroughly machined-1 to; parallelism: terminating in an annular inwardlyextending flange 2U, which asf Willi beA subsequently* showing, providesorf .forms a valve seat or movement limit for a plunger 22.

After the inner surfaces or Wall I8 have been roughly machined, aresilient seal 24 having an apertured bottom and flange-like sides isforcibly placed upon the seat 20 and thereafter a sleeve 26 is forcedwithin the body I2 until the one end of the sleeve rests upon the seal24. The one end of the sleeve 26 is moulded in such form as shown inFigure 2 as to accommodate the wall portion of the seal 24. Thisarrangement provides a positive means for securing the seal 24 in xedposition.

The plunger 22, as shown, is formed with a tapered seating portion 28which first compresses the circumferential edge portions of the,aperture in the, resilient seat 24 and thereafter comes to rest upon theapertured edge of the flange 20.

The taper of the plunger terminates approximately at point 30 andthereafter extends upwardly with cylindrical sides 32 which in turnterminate in a plural number of parallel ribs 34 in- 4wardly spaced fromthe inner walls of the sleeve 26 and terminating in an annularover-hanging band 36 is sliding contact with the inner wall of thesleeve 26. A spring 38 set within the plunger and having its other endin abutment with the under side of the threaded plug I6 is adapted tonormally force the plunger into seated position during those intervalsin which there is no :duid circulating through the pipe or tube in whichthe valve is situated.

During periods of normal operation in which iluid is flowing through thevalve l0, positive means Iare employed to lift the plunger 22 from itsseat, and one such means is illustrated in the fitting 40 which isadapted to be threadedly sel ing upwardly from the fitting 40. When thetthe plunger 22, thereb'y unseating it and forcing it to the positionshown in dotted lines, therebyY enabling fluid to pass throughVthervalve without undue hindrance or increase in pressure. VHowever,upon disconnecting the tting, as may be the case during repair to thesystem in which the valve is a part, the nib is withdrawn from pressurecontact Ywith the plunger and enabling the spring 38 to force theplunger firmly upon its seat so that fluid .under back-pressure cannotiiow or drip from the valve H).V Y

Whether the Valve I0 is secured in a special tting constitutingY aportion of the fire-Wall of an- Y airplane or to a detachable fitting ofthe general character illustrated is quite immaterialftheonlyconsideration of material moment isethefy proviv sion of means in astop-Valve of the characterV vcontemplated to eliminatedrippageitherefrom l Y during those periods thatrthe incoming line is Ydisconnected. Y Y V-Grenerally speaking stop-flow valvesare not new theYwall thickness of the resilient valve seat cushion and this latterelement is xedly secured in functional position by the sleeve afterinstallation in a valve body. Y

When the plunger 22 is spring pressed to its stop limit, it of coursefirst comes in conta-ct ing-'oi any possible'back flow or drippage fromthe valve or tubing forwardly thereof.

fl'. claim:

In ak valve, a valve body, an inwardly directed and apertured ang'epositioned between the ends Y of said valve body, a pre-moulded plasticsleeve the valve. The sleeve is of course moulded with alslghtlyconstricted end portion to accommodate Y i lining the inner wallof the valve body wherebsr Ymachining thereof is obviated. a resilientcup shaped secondary valve seat having an aperture in the bottom thereofand of slightly greater diameter than the diameter of the aperture insaid flange. the Wall of said cup being in contact with thei wall ofsaid valve body, said lining or sleeverhaving an end portion extendingwithin said Acup and in longitudinal end pressure contact with thebottom thereof whereby the'cup is held in fixed positionY with respectto the Yaperture in said ilange, and a spring pressed valve memberinslidable contact with the inner'wall of said sleeve and adaptedL to bein sealing contact with the edge of theaperture in said cup and with theedge of the aperture in said ange.

CLARENCE POOL.v

